Hydrocurable compositions of hydroxy (polyalkylenecarbonyloxy)-alkyleneoxazolidine and an isocyanate

ABSTRACT

Hydrocurable compositions of a hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine and a polyfunctional isocyanate are disclosed. The compositions are useful in forming films, paints, coatings, fibers, seamless flooring, coatings, impregnants and adhesives for natural and synthetic materials. The compositions are prepared by treating a hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine with a polyfunctional isocyanate or by treating a bisoxazolidine isocyanate prepolymer with a polyfunctional isocyanate.

United States Patent Emmons Oct. 14, 1975 [54] HYDROCURABLE COMPOSITIONS OF [56] References Cited HYDROXY UNITED STATES PATENTS (POLYALKYLENECARBONYLOXY)- 3,743,626 7/1973 Emmons 260/77.5 AQ ALKYLENEOXAZOLIDINE AND AN OTHER PUBLICATIONS ISOCYANATE William D. Emmons, Huntingdon Valley, Pa.

Assignee: Rohm & Haas Company,

Philadelphia, Pa.

Filed: Dec. 14, 1973 Appl. No.: 425,007

Inventor:

US. Cl. 260/77.5 MA; 1 17/132; 252/182; 260/78.3; 260/77.5 AQ; 260/77.5 AN; 260/307 R; 260/307 F Int. Cl. ..C08G 18/34; C08G 18/38: C08G 18/46 Field of Search ..260/77.5 AQ, 2.5 AQ,

'260/77.5 AN, 77.5 MA, 307 R, 307 F; 252/182 Christiansen, J. Am. Chem. Soc., 82, 1960, pp. 5566.

Primary Examiner-M. .1. Welsh ABSIRACT 14 Claims, N0 Drawings 1 HYDROCURABLE COMPOSITIONS OF HYDROXY POLYALKYLENECARBONYLOXY ALKYLENEOXAZOLIDINE AND AN ISOCYANATE This invention relates to a novel composition comprising a hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine and a polyfunctional aliphatic or aromatic isocyanate which has an outstanding balance of speed of cure relative to its stability. The composition cures in the presence of moisture to afford tough chemically resistant polymeric materials. This invention also relates to the novel hydroxy(polyalkylenecarbonyloxvy)alkyleneoxazolidines and bisoxazolidine isocyanate prepolymers.

The reaction of isocyanates with active hydrogen compounds such as amines and alcohols to form polyureas and polyurethanes has been greatly studied in the prior art, and this general class of polymers has been found to possess many useful properties. Since isocyanates generally react quickly and efficiently with active hydrogen compounds at room temperature, these two components usually must be mixed together only at the time and place at which reaction is desired. In previous approaches to making one pot compositions, in which the reacting materials are packaged together before using and later activated, relatively unreactive derivatives of isocyanates have been employed which regenerate the free isocyanate upon heating. Various catalysts are also often contained in these compositions to facilitate the regeneration of isocyanate. However, the heating process has several disadvantages, especially when the polyurea of polyurethane is to be used as a coating. For example, the size of the article to be coated or the nature of the material of which the article is made may preclude heating to the temperature necessary for polymerization to occur. Thus, it is extremely desirable to have polymer forming compositions which are stable on storage and which can be cured in the absence of any extensive heating and without the specific addition of other materials. Moreover, polyurea or polyurethane forming compositions having improved cure times would also be quite valuable.

It has now been found that compositions comprising a hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine and a polyfunctional aliphatic or aromatic isocyanate will cure in the presence of water such as atmospheric moisture to afford tough and useful polymeric materials.

The hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidines (I, infra) employed in the novel hydrocurable compositions of this invention have the following structural formula:

wherein R is hydrogen, mononuclear aryl, for example, phenyl and the like, aralkyl, for example, benzyl and the like or alkyl, for example, alkyl of from 1 to 12 carbon atoms such as methyl, ethyl, n-propyl, n-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, do-

decyl and the like; R is hydrogen or alkyl, for example, lower alkyl of from l to 4 carbon atoms such as methyl, ethyl, n-propyl, n-butyl and the like; or R and R are joined together with the carbon atom to which they are attached to form cycloalkyl of from 5 to 6 carbon atoms, such as cyclopentyl, cyclohexyl and the like; R is hydrogen, alkyl, cycloalkyl, alkoxy or mononuclear aryl; Y is unsubstituted or substituted lower alkylene such as ethylene or propylene, wherein the substituents may be one or more radicals selected from alkyl, for example, alkyl of from 1 to 12 carbon atoms, aryl of 6 to 10 carbon atoms, aralkyl or alkanoyl of 7 to 12 carbon atoms. The R, R and R radicals may be further substituted with halo such as chloro, fluoro, bromo and the like, lower alkoxy, such as methoxy, ethoxy and the like, hydroxy, amino or nitro; X is substituted or unsubstituted lower alkylene such as ethylene, propylene, butylene and the like, wherein the substituent may be one or more alkyl radicals, for example, lower alkyl of from 1 to 6 carbon atoms; n is an integer of at least 4, for example, 4 to 6, and z is an integer of l to 50.

A wide variety of polyfunctional isocyanates, that is, isocyanates having at least two NCO groups, can be used in the compositions of the invention and substantially any isocyanate having two or more NCO groups which will react with an oxazolidine in the presence of moisture can be used. The isocyanates which are used in the compositions of the invention are well-known in I the art.

Examples of the polyisocyanates which can be used in the compositions of the invention are aliphatic diisocyanates such as a diisocyanate derived from a 36 carbon diamine (DDI General Mills, Inc.), l,6-hexamethylene diisocyanate, 1,8-octamethylene diisocyanate, l,l2-dodecamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, and similar alkylene diisocyanates, 3,3-diisocyanatodipropyl ether, 3- isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, cyclopentylene-1,3-diisocyanate, cyclohexylene- 1,4-diisocyanate, methyl 2,6-diisocyanatocaproate, and related isocyanates, bis(2-isocyanatoethyl)fumarate, 4-methyl-l,3-diisocyanatocyclohexane, transvinylene diisocyanate and similar unsaturated isocyanates, 4,4-methylene-bis( isocyanatocyclohexane and related isocyanates, menthane diisocyante, N,N,- N '-tris )6-isocyanatohexamethylene )biuret, and related isocyanates, bis(2-isocyanatoethyl)carbonate, and similar carbonate diisocyanates, as well as other known isocyanates derived from aliphatic polyamines, aromatic isocyanates such as tolylene diisocyanates, xylylene diisocyanates, dianisidine diisocyanate, 4,4'- diphenylmethane diisocyante, l-ethoxy-2,4- diisocyanatobenzene, l-chloro-2,4-diisocyanatobenzene, tris(4-isocyanatophenyl)methane, naphthalene diisocyanates, fluorene diisocyanates, 4,4'-biphenyl diisocyanate; phenylene diisocyanates, 3,3'-dimethyl- 4,4'-biphenyl diisocyanate, p-isocyanatobenzyl isocyanate, tetrachloro-l,3-phenylene diisocyanate, and related isocyanates, 2,4,6-tribromo-l,3-phenylene diisocyanate, bis(2-isocyanatoethyl)benzene, vinyl polymers containing isocyanatoethyl methacrylate as a monomer or comonomer, prepolymers of polyisocyanates with polyhydroxyl orpolyamino compounds, such as prepolymers of -isocyanatomethyl-3,3,5-trimethylcyclohexylisocyanate, tolylene diisocyanate, menthane diisocyanate,

4,4-methylene-bis(cyclohexylisocyanate), 2- isocyanatoethyl 6-isocyanatocaproate, 2-isocyanatoethyl 2-isocyanatopropionate and the like, with polyether polyols, polyester polyols, and the like. Preferred isocyanates of this invention include N,N'N- tris(6-isocyanatohexamethylene)biuret; 4,4-methylene-bis(cyclohexylisocyanate), and aliphatic diisocyanate derived from a 36 carbon diamine, methylenebis(4-phenylisocyanate); toluene diisocyanate, 3- isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, 2-isocyanatoethyl- 6-isocyanatocaproate or 2- isocyanatoethyl-2-isocyanatopropionate.

The preparation of the isocyanate prepolymers useful in the compositions of this invention is well-known in the art. The preparation of these prepolymers involves the reaction of the hydroxy terminated polyester, with a diisocyanate or polyisocyanate, using an excess of the isocyanate to yield an isocyanate terminated prepolymer product. A description of the techniques for preparing the isocyanate prepolymers is found in J. H. Saunders and K. C. Frisch, Polyuret/zanes: Chemistry and Technology, Part 11, lnterscience (New York,

1964); especially on pages 8 to 49.

Other polyfunctional isocyanates useful in the compositions of the invention are disclosed in U.S. Pat. Nos. 3,162,664; 3,427,346; 3,275,679; 3,352,830; 2,729,666; 2,768,154; 3,267,122; 3,281,378; 3,124,605 and 2,718,516.

A preferred embodiment of this invention is a hydrocurable coating composition comprising a hydroxy(polypentylenecarbonyloxy)ethyloxazolidine of the following formula:

wherein R is hydrogen or lower alkyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl and the like; 1' is an integer of 5-20 and an isocyanate selected from N,N,- N '-tris( 6-isocyanatohexamethylene )biuret; 4,4- methylene-bis(cyclohexylisocyanate); a diisocyanate derived from a 36 carbon diamine (DDI), methylenebis-(4-phenylisocyanate), toluene diisocyanate or isophorone diisocyanate. These compounds afford high solids containing compositions having an outstanding speed of cure and exceptional pot life.

The reaction of the hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine (1, supra) with a diisocyanate can afford two products depending on the molar ratio of diisocyanate employed. To afford a monooxazolidine isocyanate polymer the molar ratio of the isocyanate functionality must be equal to or greater than 1. Preferably the molar ratio of isocyanate functionality is in the range of from about 1 to about 3. The following equation illustrates this reaction.

wherein R, R and R", X, Y and z are as defined above. In is an integer equal to the valence of Z and Z is a polyvalent organic isocyanate residue derived from a known isocyanate. The polymer (Ill, supra), is a hydrocurable polymer.

When the molar ratio of a polyisocyanate (ll, infra) is reduced to 0.5 or less, a chain extended, coupled bisoxazolidine (1V, infra) can be prepared which is an isocyanate prepolymer. The following formula illustrates this product:

wherein R, R R, X, Y, Z, n, m and z are defined above. Polymer lV (supra) is a stable polyester urethane which can be further blended with additional dior polyisocyanates to form hydrocurable compositions.

The hydroxy(polyalkylenecarbonyloxy)alkyleneoxazolidine (1, supra) is prepared by treating a hydroxyalkyleneoxazolidine (V, supra) with a lactone (V1, infra) having at least five carbon atoms in the presence of a transesterification catalyst at a temperature in the range of from about 0 to 200C. for a period of time from about 1 to about 24 hours. The following equation illustrates this process:

wherein R R R, X, Y and n are as defined above. By employing a large molar excess of the lactone (V1), for example, at least 5 moles of lactone per mole of the hydroxyalkyleneoxazolidine (V), there is assured a complete reaction of the hydroxyalkyleneoxazolidine (V).

Catalysts which may be employed include the organometallic compounds, metals, metal hydrides, metal alkoxides, amines and the like. The preferred catalysts are metal alkoxides such as sodium methoxide I and the like, tetrapropyl titanate, tetraalkylammonium alkoxides, such as tetraethylammonium ethoxide, and the like and alkyl tin oxides, esters and alkoxides such as dibutyltin oxide, dibutyltin dimethoxide, dibutyltin diacetate or dilaurate and the like.

The preparation of the hydroxyalkyleneoxazolidines (V, supra) is disclosed in U.S. Pat. No. 3,743,626 which patent is hereby incorporated by reference.

Examples of the lactones which may be employed include, for example, B-propiolactone, 8-valerolactone, e-caprolactone, 7-hydroxyheptanoic acid lactone, 8-

hydroxyoctanoic acid lactone, l2-hydroxydodecanoic acid lactone, l3-hydroxytridecanoic acid lactone, l4- hydroxytetradecanoic acid lactone, l5-hydroxypentadecanoic acid lactone, l6-hydroxyhexadecanoic acid lactone, l7-hydroxyheptadecanoic acid lactone; the a, a-dialkyl-B-propiolactones, for example, a,a-dimethyl- B-propiolactone, a,a-diethyl-B-propiolactone, oz,adipropyl-B-propiolactone and the like; fi-valerolactones, Wherein the alkyl is from 1 to l2 carbon atoms, such as isopropyl, butyl, hexyl, decyl, dodecyl and the like; dialkyl-S-valerolactones in which the alkyl groups of from 1 to 12 carbon atoms are substituted on the same or different carbon atoms in the cyclic ring; the monoalkyl-, dialkylor trialkyl-e-caprolactones, wherein alkyl is from 1 to 12 carbon atoms, the monoalkoxyand dialkoxy-S-valerolactones and ecaprolactones, for example, the monomethoxy-, monoethoxy-, monoisopropoxy-, dimethoxy-, diethoxy and dibutoxy-S-valerolactones, e-caprolactones and the like. Further illustrative cyclic esters include 3-ethyl-2- keto-l ,4-dioxane, y-( l-isopropyl-4-methylcyclohexyl e-caprolactone, 3-bromo- 2,3 ,4,4-tetrahydrobenzoxepin-Z-one, 2-( 2 -hydroxyphenyl)benzene carboxylic acid lactone, IO-hydroxyundecanoic acid lactone, 2,5,6,7-tetrahydrobenzoxepin-Z-one, 9-oxabicyclo[5,2,2]undecan-8-one, 4-oxal4-hydroxytetradecanoic acid lactone, a,a-bis(- chloromethyl)-propiolactone, l,4-dioxane-2-one, 3-npropyl-2-keto-1,4-dioxane, 3-( 2-ethylhexyl)-2- keto-l ,4-dioxane, and the like. Illustrative subclasses of cyclic esters which are suitable in the process of the instant invention include the unsubstituted lactones and oxalactones which contain from 6 to 18 atoms in the lactone ring, preferably fi-valerolactone, e-caprolactone, ketodioxanes and the like; the monoand polyalkyl substituted lactones and oxalactones which contain from 6 to 8 atoms in the lactone ring, preferably, the monoand poly lower alkyl 5-valerolactones, ecaprolactones, and their corresponding oxalactones wherein the alkyls contain from 1 to 4 carbon atoms; monoand polyalkoxy substituted lactones and oxalactones which contain from 6 to 8 atoms in the lactone ring, preferably the monoand poly-lower alkoxy-8- valerolactones, e-caprolactones, and their corresponding oxalactones wherein the alkoxy contains from 1 to 4 carbon atoms.

The unsubstituted and substituted S-nalerolactones, e-caprolactones, Q-enantholactones, and higher membered lactones, for example, monoand polyalkyl sub stituted 8-valerolactones, monoand polyalkoxy substituted 8-valerolactones, monoand polycycloalkyl substituted fi-valerolactones, aryl substituted S-valerolactones, monoand polyhaloalkyl substituted B-valerolactones, monoand polyalkyl substituted e-caprolactones, monoand polyalkoxy e-caprolactones, aryl substituted e-caprolactones, monoand polyhaloalkyl substituted s-caprolactones, monoand polyalkyl substituted g-enantholactones, and various other lactones described previously can be prepared by reacting the corresponding cyclic ketone with an anhydrous solution comprising peracetic acid and acetone. It is desirable to add the peracetic acid solution to an excess of the ketone, for example, a 5 to 1 molar ratio of ketone to peracetic acid, in a still kettle maintained under reflux. The pressure can be adjusted so as to provide a kettle temperature of about C. Acetone, acetic acid byproduct and minor amounts of ketone can be continuously removed throughout the addition period. Subsequently, the lactone product can be recovered from the still kettle by conventional techniques such as by distillation.

The reaction between the oxazolidines (l, supra) and the isocyanate component is initiated by water, for example, atmospheric moisture. A trace amount of atmospheric moisture is generally sufficient to initiate the polymerization reaction and cure the composition. If desired, water, for example, other than atmospheric, may be added to the compositions to effect cure, but this is not necessary. It is believed that the polymeric materials formed from the compositions of the invention result from the rapid hydrolysis of the oxazolidine which opens the oxazolidine ring at one of the bonds to the oxygen atom. The following reaction sequence illustrates the postulated path of the hydrolysis:

The amino alcohol produced has active hydrogen sites which react rapidly with an isocyanate. The isocyanate can reactwith either the amino group or the hydroxy group but is believed to be faster with the amino group.

Since the isocyanate is polyfunctional and the oxazolidine reacts in the presence of water as a polyfunctional compound, their reaction, as described above, will produce a highly polymeric material. Of course, a compound having more than one oxazolidine group will react as a polyfunctional material even if the isocyanate and oxazolidine are present in such proportions as to cause primary reaction during cure with the amine functionality only. While the hydrocuring reaction, that is, the hydrolysis and ensuing polymerization, will normally occur rapidly at ambient temperatures, elevated temperatures may facilitate reaction and curing under some conditions.

The hydrocuring reaction can be carried out with or without a catalyst. Under certain conditions, an acid catalyst, such as p-toluenesulfonic acid, dibutyltin octoate, zinc chloride, hydrogen chloride and the like, may be advantageously employed. The acid catalyst will generally be present in an amount of from about 0.001% to about 10% by weight based on the weight of oxazolidine, and preferably from about 1% to about 5% by weight.

The compositions of the invention need not contain a solvent, but an inert or relatively inert solvent can be added to the composition, if desired, either at the time of original formulation or at the time of use. The rate of the hydrolysis of the oxazolidine and the subsequent reaction with isocyanate can be influenced by the presence of a solvent. Solvents which are suitable for use in the compositions of the invention should be substantially free from active hydrogen atoms as determined by the Zerewitinoff method, described in Kohler et al., J. Am. Chem. 500., 40, 2181-8 (1927), and should also be substantially anhydrous. Included among the solvents which can be used are toluene, xylene, liquid aliphatic hydrocarbons, isopropyl ether, ethyl acetate, B-ethoxyethyl acetate, methyl ethyl ketone and the like, as well as mixtures of such solvents. Pigments, dyes, fillers, antioxidants, antiozodants, stabilizers, flow control agents or other optional ingredients can also be included in the compositions of the invention.

The compositions of the invention can be used in forming films, fibers, paints, lacquers, varnishes, seamless flooring, caulks, as coatings, impregnants, adhesives for both natural and synthetic substrates, such as paper, textiles, wood, plastics, metal or leather and also as binders for non-woven fabrics. To prepare coatings and films, the compositions of the invention can be applied with or without solvent by casting permanently or removably onto a suitable substrate such as wood, metal, plastic, paper or leather.

The compositions of the invention .provide an improved combination of increased pot life and increased curing speed with respect to those combinations which contain compounds having free amine groups.

Various embodiments of the compositions of the invention and the polymeric materials formed from them exhibit a number of desirable and advantageous properties. Some of the compositions can be sealed in a single package so that if moisture is excluded, undesirable thickening or gelling do not occur during storage. Even those compositions that are not extremely stable in one-pot formulations offer improved stability over conventional two-pot urethane systems. Since exposure to atmospheric moisture will effect cure, no additional materials need be mixed with these compositions at the time of use, thus facilitating greatly their handling. Furthermore, when no solvent is incorporated in the compositions, they are extremely high solids coating materials. When some of the compositions are used for the impregnation of leather, they provide significant improvements in break over known urethane systems.

The examples which follow illustrate the hydroxy(- polyalkylenecarbonyloxy)alkyleneoxazolidines (I) of the invention and the methods by which they are prepared. However, the examples are illustrative only and it will be apparent to those having ordinary skill in the art that all of the products embraced by Formula 1, supra, may also be prepared in an analgous manner by substituting the appropriate starting materials for those set forth in the examples.

EXAMPLE 1 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl]oxazolidine (MW 1240) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is charged hydroxyethyloxazolidine (HEOX, 1.5 mole, 175.5 g.), ecaprolactone (3.0 mole, 342.0 g.) and dibutyltin oxide (Bu SnO, 0.75% on polyester, 7.73 g.). The flask charge is heated to 100C. and held at that temperature while e-Cl (4.5 mole, 513.0 g.) is added over a 60 minute period. After the addition is complete, the batch is held at 100C. for 4 hours to complete reaction. The product 3-[hydroxy(polypentylenecarbonyloxy)ethylloxazolidine (MW 1240) is a fluid while hot but on cooling forms a waxy solid (acid 0.130 meq./g., amine 1.38 meq./g., GPC mol. wts. M 1240, M,,770 Mw/M 1.62, calcd. mol. wt. 687, equivalent weight for reaction with isocyanate 229 g./eq.

EXAMPLE 2 Hydrocurable composition of 3-[Hydroxy( polypentylenecarbonyloxy)ethyl]oxazo1idine (MW 1240) and DDl 3-[Hydroxy(polypentylenecarbonyloxy)ethyl]oxazolidine (MW 1240) (0.01 eq., 2.29 g.) is dissolved in xylene (5.3 g.) and a diisocyanate derived from a 36 carbon diamine (DDI) (.01 eq., 3.00 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and is allowed to cure at room temperature (tack-free time 60 minutes, clear film, swelling by 2-ethoxyethyl acetate is light, pencil hardness 6B).

EXAMPLE 3 Hydrocurable composition of 3-[Hydroxy(polypentylenecarbonyloxy)ethylloxazolidine and N,N ,N' -tris( 6-isocyanatohexamethylene )biuret 3-[Hydroxy(polypentylenecarbonyloxy)ethyl]oxazolidine mol. Wt. 1240 (0.01 eq., 2.29 g.) is dissolved in xylene (3.6 g.) and N,N',N"-tris(6-isocyanatohexamethylene)biuret (0.01 eq., 2.50 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 10 minutes, clear film, swelling by 2-ethoxyethyl acetate is very slight, pencil hardness H).

EXAMPLE 4 Hydrocurable Composition of 3- Hydroxy(polypentylenecarbonyloxy )ethyl loxazolidine and 4,4-methylenebis(cyclohexylisocyanate) 3-[Hydroxy(polypentylenecarbonyloxy)ethyl]oxazolidine (0.01 eq., 2.29 g.) is dissolved in xylene (3.6 g.) and 4,4-methylenebis(cyclohexylisocyanate (0.01 eq., 1.31 g.) is added. After mixing, a 10 mil. wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 60 minutes, clear film, swelling by 2-ethoxyethyl acetate is very slight, pencil hardness F).

EXAMPLE 5 Composition of 3-[l-lydroxy( polypentylenecarbonyloxy )ethyl ]oxazo1idine and 4,4 '-methylenebis(cyclohexylisocyanate) A mixture of 3-[hydroxy(polypentylenecarbonyloxy)ethy1]oxazo1idine (0.64 mole, 443.0 g.) is heated to C. and then 4,4-methy1enebis(cyclohexylisocyanate) (0.32 mole, 83.8 g.) is added. The mixture exotherms to 1 13 C. and is allowed to cool with stirring to C. over a 30 minute period. At room temperature this isocyanate coupled bisoxazolidine product forms a waxy solid (calcd. mol. wt. 1636, 409 g./eq. for reaction with isocyanate). The product is mixed with xylene and various diand polyisocyanates to produce moisture curing coatings.

EXAMPLE 6 3- Hydroxy( polypentylenecarbonyloxy )ethyl ]oxazo1idine and DDl A mixture of 3-[hydroxy(polypentylenecarbonyloxy)ethyl]oxazo1idine 1.50 mole, 1030.5 g.) is heated to 80 C. and DDl (0.75 mole, 450 g.) is added. The mixture exotherms to 98 C. and is allowed to cool with stirring to 80 C. over 30 minutes. At room temperature this isocyanate coupled bisoxazolidine product forms a waxy solid (calcd. mol. wt. 1976, 494 g./eq. for

reaction with isocyanates).

EXAMPLE 7 Hydrocurable Composition of the bisoxazolidine of Example 6 and N ,N ,N -tris( 6-isocyanatohexamethylene )biuret The product of Example 6 (0.01 eq., 4.94 g.) is dissolved in xylene (7.5 g.) and N,N',N"-tris(6- isocyanatohexamethylene))biuret (0.01 eq., 2.50 g.) is added. After mixing, a mil wet film is cast on a glass plate and allowed to cure at room temperature (tackfree time minutes, clear film, swelling in 2-ethoxyethyl acetate light).

EXAMPLE 8 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl ]oxazolidine (MW 1590) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is added HEOX (0.4 mole, 46.8 g.), e-caprolactone (3.2 mole, 364.8 g.) and Bu SnO( 1.0% on polyester, 4.14 g.). The mixture is heated to 100 C. and held there for 260 minutes while e-caprolactone reacts. The product is a fluid while hot but on cooling forms a waxy solid (acid 0.091 meq./g., amine 0.936 meq./g., GPC mol. wt. M,,.1590, M,,980, M,,./M,, 1.62, calcd. mol. wt. 1030, equivalent weight for reaction with isocyanate 343 g./3 g.).

EXAMPLE 9 Hydrocurable Composition of 3-[Hydroxy( polypentylenecarbonyloxy)cthyl]oxazolidine (MW 1590) and DDl 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl oxazolidine (MW 1590) (0.01 eq. 3.43 g.) is dissolved in xylene (6.4 g.) andDDl (0.01 eq. 3.00 g.) is added. After mixing, a 10 mil film is cast on a glass plate and is allowed to cure at room temperature (tack-free time 60 minutes, hazy film, swelling by 2-ethoxyethyl acetate is light, pencil hardness 6B.

EXAMPLE l0 Hydrocurable Composition of 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl ]oxazolidine (MW 1590) and N,N ,N '-tris( 6-isocyanatohexamethylene )biuret 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl oxazolidine (MW 1590) (0.01 eq. 3.43 g.) is dissolved in xylene (5.0 g.) and N,N,N"-tris( 6-isocyanatohexamethylene)biuret (0.01 eq. 2.50 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 10 minutes, clear film, swelling by 2-ethoxyethyl acetate very slight, pencil hardness F).

EXAMPLE 1 l Hydrocurable Composition of 3- Hydroxy( polypentylenecarbonyloxy )ethyl loxazolidine (MW 1590) N ,N ,N 'tris( 6-isocyanatohexamethylene )biuret 3- Hydroxy( polypentylenecarbonyloxy )ethyl oxazolidine' (MW 1590) (0.01 eq. 3.43 g.) is dissolved in xylene (4.7 g.) and 4,4-methylenebis(cyclohexylisocyanate)-(0.0l eq.;.1.31 g. is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 120 minutes, clear film, swelling by 2-ethoxyethyl acetate very slight,

pencil hardness 3B).

EXAMPLE l2 Hydrocurable Composition of 3- Hydroxy( polypentylenecarbonyloxy )ethyl oxazolidine (MW 1590) and toluene diisocyanate 3-[ Hydroxy(polypentylenecarbonyloxy)ethyl1oxazolidine (MW 1590) (0.01 eq. 3.43 g.) is dissolved in xylene (4.4 g.) and toluene diisocyanate (0.01 eq. 0.9 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 60 minutes, clear film, swelling by 2- ethoxyethyl acetate slight).

EXAMPLE 13 3-[Hydroxy(polypentylenecarbonyloxy)ethy1]oxazolidine (MW 1257) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is charged HEOX (0.09 mole, 105.3 g.) e-caprolac'tone 1.8 mole, 205.2 g.) and Bu SnO (0.75% on polyester, 8.49 g.). The flask is heated to 100 C. and held at that temperature while more e-caprolactone (7.2 mole, 820.8 g.) is added over 60 minutes. The batch is held at 100 C. for 6 hours to complete reaction. The product hydroxy(polypentylenecarbonyloxy)ethyloxazolidine is a fluid while hot but on cooling, forms a waxy solid (calcd. mol. wt. 1257, equivalent weight for reaction with isocyanate, 419 g./eq.

EXAMPLE 14 Bisoxazolidine of 3- Hydroxy( polypentylenecarbonyloxy )ethyl oxazolidine and 4,4'-methylenebis( cyclohexylisocyanate) The bisoxazolidine of 3-[hydroxy(polypentylenecarbonyloxy)ethyljoxazolidine 0.42 mole 531.9 g.) is heated to C. 4,4-methylenebis(cyclohexylisocyanate) (0.21 moles, 55.0 g.) is then added. The mixture exotherms to 101 C. and is held for 30 minutes to complete the reaction. At room temperature the product is a waxy solid (calcd. mol. wt. 2776, 694 g./eq. for reaction with isocyanates).

EXAMPLE 15 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl ]oxazolidine (MW 2570) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is added HEOX (0.60 mole, 70.2 g.) e-caprolactone (1.2 mole, 136.8 g.) and Bu SnO (0.75% of total polyester, 8.22 g.). The flask charge is heated to 100 C. and held at that temperature while more e-caprolactone (7.8 mole, 889.2 g.) is added over a 60 minute period. After the addition is complete, the batch is maintained at 100 C. for 6 hours to complete reaction. The product is a fluid while hot but on cooling forms a waxy solid (acid 0.09 meq./g., amine 0.523 meq./g., GPC mol. wts. Mw 2570 Mn 1690 M,,./M,, 52; calcd. mol. wt. 1827. Equivalence for reaction with isocyanate 609 g./eq.

EXAMPLE l6 Hydrocurable Composition of 3-[Hydroxy(polypentylenecarbonyloxy )ethyl]oxazo1idine and DDl 3-[ Hydroxy(polypentylenecarbonyloxy )ethyl oxazolidine (0.01 eq. 6.09 g.) is dissolved in xylene (9.0 g.) and DDI (0.01 eq. 3.00 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and is allowed to cure at room temperature (tack-free time minutes, hazyfilm, swelling in 2-ethoxyethyl acetate is moderate with some lifting from glass, pencil hardness 6B).

EXAMPLE 17 Hydrocurable Composition of 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl ]oxazolidine and N,N ,N' -tris( 6-isocyanatohexamethylene )biuret Bisoxazolidine of 3-[hydroxy(polypentylenecarbonyloxy)ethyl]oxazolidine (0.01 eq. 6.09 g.) is dissolved in xylene (8.6 g.) and N,N,N"-tris(6- isocyanatohexamethylene)biuret (0.01 eq. 2.50 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tackfree time minutes, clear film, swelling in 2-ethoxyethyl acetate is very slight, pencil hardness 6B).

EXAMPLE l8 Hydrocurable Composition of Hydroxy(polypentylenecarbonyloxy)ethyloxazolidine and toluene diisocyanate Hydroxy(polypentylenecarbonyloxy)ethyloxazolidine (0.01 eq. 6.09 g.) is dissolved in xylene (7.0 g.) and toluene diisocyanate (0.01 eq. 0.9 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and is allowed to cure at room temperature (tack-free time 60 minutes, hazy film, swelling in Z-ethoxyethyl acetate slight).

EXAMPLE 19 3-[ Hydroxy( polypentylenecarbonyloxy )ethyl ]oxazolidine and 4,4-methylenebis(cyclohexylisocyanate) 3-[Hydroxy(polypentylenecarbonyloxy)ethyljoxazolidine 0.28 mole, 515.4 g.) is heated to 80 C. and 4,4'-methylenebis(cyclohexylisocyanate) (0.14 mole, 36.7 g.) is added. The mixture exotherms to 92 C. and is held at 95100 C. for 30 minutes to complete reaction. At room temperature, this isocyanate coupled, bisoxazolidine product forms a waxy solid (calcd. mol. wt. 3916, 979/eq. for reaction with isocyanate). The product is mixed with xylene and various diand polyisocyanates to produce moisture curing coatings.

EXAMPLE 20 3-[ Hydroxy-( polypentylenecarbonyloxy )ethyl1-2-isopropyloxazolidine (MW-730) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is added 2-isopropyl-1-hydroxyethyloxazolidine (lPOX, as an 82.3% solution in xylene, 1.50 mole, 289.8 g.) and Bu SnO (0.25% on total polyester 2.73 g). The flask is heated to 125 C. and e-caprolactone (7.5 mole, 855.0 g.) is added over a 60 minute period. When the addition is complete, the batch is held at 125 C. for 2 hours to complete the reaction. The product, 3-[hydroxy- (polypentylenecarbonyloxy)ethylj-2-isopropyloxazolidine (MW-730) is a fluid while hot but on cooling to room temperature forms a waxy solid (calcd. mol. wt. 730, solids 95.2%, equivalent weight as supplied for reaction with isocyanate, 255 g./eq.

EXAMPLE 21 Hydrocurable Composition of 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2-isopropyloxazolidine and N,N ,N '-tris( 6-isocyanatohexamethylene )biuret' 3-[ Hydroxy-( polypentylenecarbonyloxy)ethyl ]-2- isopropyloxazolidine (0.0l eq., 2.55 g.) is dissolved in xylene (5.1 g.) and N,N,N"-tris(6-isocyanatohexamethy1ene)biuret (0.01 eq., 2.50 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 60 min- 12 utes, clear film, swelling by 2-ethoxyethyl acetate very slight, pencil hardness F).

EXAMPLE 22 Hydrocurable Composition of 3- Hydroxy-( polypentylenecarbonyloxy )ethyl ]-2-is0- propyloxazolidine (MW-730) and 4,4-methylenebis(cyclohexylisocyanate) 3-[ Hydroxy-(polypentylenecarbonyloxy )ethyl ]-2- isopropyloxazolidine (MW-730) (0.01 eq., 2.55 g.) is dissolved in xylene (3.9 g.) and 4,4'-methylenebis(cyclohexylisocyanate) (0.01 eq., 1.31 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 120 minutes, clear film, swelling with 2-ethoxyethyl acetate slight, pencil hardness F).

EXAMPLE 23 Bisoxazolidine 3- Hydroxy-( polypentylenecarbonyloxy )ethyl ]-2-isopropyloxazolidine (MW-730) and 4,4-methylenebis(cyclohexylisocyanate) EXAMPLE 24 Bisoxazolidine of 3- Hydroxy-( polypentylenecarbonyloxy )ethyll-Z-isopropyloxazolidine (MW-730) and N,N,N"-tris(6-isocyanatohexamethylene)biuret 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2- isopropyloxazolidine (MW-730) (0.75 mole, 573.8 g.) is heated to C. and then N,N',N"-tris(6- isocyanatohexamethylene)biuret (0.25 mole, 188.0 g.) is added. The mixture exotherms to 103 C. and is held at C. with stirring for 30 minutes. At room temperature, this isocyanate coupled, bisoxazolidine polyester slowly forms a waxy solid (calcd. mol. wt. 1834, solids 90.3%, equivalent weight as supplied for reaction with isocyanate 508 g./eq.). The product is mixed with xylene and various diand polyisocyanates to produce moisture curing coatings.

EXAMPLE 25 3-[ Hydroxy-( polypentylenecarbonyloxy )ethyl -2-isopropyloxazolidine (Mw 1072) To a flask equipped for stirring, addition, heating, reflux, and automatic temperature control is added lPOX (0.40 mole, 78.1 g.), e-caprolactone (3.2 mole, 364.8 g.) and Bu SnO (1% on polyester, 4.14 g.). The mixture is heated to 100 C. and held there for 8 hours. The product is a fluid while hot but on cooling forms a waxy solid (calcd. mol. wt. 1072, solids 96.7%, equivalent weight as supplied for reaction with isocyanates 369 g./eq.

EXAMPLE 26 Hydrocurable Composition of 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2-isopropyloxazolidine and DDl 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2- isopropyloxazolidine 0.01 eq., 3.69 g.) is dissolved in 13 xylene (6.7 g.) and DDI (0.01 eq., 3.00 g.) is added. After mixing, a mil wet film is cast on a glass plate and is allowed to cure at room temperature (tack-free time 240 minutes, clear film, swelling by 2-ethoxyethyl acetate moderate, pencil hardness 6B).

EXAMPLE 27 Hydrocurable Composition of 3-[1-1ydroxy-(polypentylenecarbonyloxy)ethyl ]-2-isopropyloxazolidine (Mw 1072) and N,N ,N '-tris( 6-isocyanatohexamethylene )biuret 3- Hydroxy-( polypentylenecarbonyloxy )ethyl -2- isopropyloxazolidine (Mw 1072) (0.01 eq., 3.69 g.) is

'dissolved in xylene (6.2 g.) and N,N,N"-tris(6- isocyanatohexamethylene)biuret (0.01 eq., 2.50 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tackfree time 30 minutes, clear film, swelling by 2-ethoxyethyl acetate very slight, pencil hardness F).

EXAMPLE 28 3- Hydroxy-( polypentylenecarbonyloxy )ethyl -2-isopropyloxazolidine (Mw 1072) and 4,4-methylenebis( cyclohexylisocyanate) 3-[ Hydroxy-( polypentylenecarbonyloxy )ethyl ]-2- isopropyloxazolidine (Mw 1072 (0.01 eq., 3.69 g.) is dissolved in xylene (5.0 g.) and 4,4'-methylenebis(cyclohexylisocyanate) (0.01 eq., 1.31 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 120 minutes, clear film, swelling with 2-ethoxyethyl acetate slight, pencil hardness F).

EXAMPLE 29 Hydrocurable Composition of 3-[ Hydro xy-( polypentylenecarbonyloxy )ethyl -2-isopropyloxazolidine (Mw 1072) and toluene diisocyanate 3 Hydroxy-( pol ypentylenecarbonyloxy )ethyl ]-2- isopropyloxazolidine (Mw 1072) (0.01 eq., 3.69 g.) is dissolved in xylene (4.6 g.) and toluene diisocyanate (0.01 eq., 0.9 g.) is added. After mixing, a 10 mil wet film is cast on a glass plate and allowed to cure at room temperature (tack-free time 30 minutes, clear film, swelling with 2-ethoxyethyl acetate slight).

EXAMPLE 30 Bisoxazolidine of 3 Hydroxy-( polypentylenecarbonyloxy )ethyl -2-isopropyloxazolidine (Mw 1300) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is added lPOX (0.8 mole, 154.6 g.) and Bu SnO (0.25%) on polyester, (26.0 g. The flask is heated to 125 C. and e-caprolactone (8.0 mole, 9.12 g.) is added over a 60 minute period. When the addition is complete, the batch is held at 125 C. for 10 more minutes to ensure a complete reaction. The product is a waxy solid (calcd. mol. wt. 1300, solids 97.2%, equivalent weight as supplied for reaction with isocyanate, 445 g./eq. The product is mixed with xylene and various diand polyisocyanates to produce moisture curing coatings.

EXAMPLE 31 Bisoxazolidine of 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2-isopropyloxazolidine (Mw 730) and 4,4-methylenebis(cyclohexylisocyanate) 3-[ Hydroxy-( polypentylenecarbonyloxy )ethyl ]-2- isopropyloxazolidine (MW-730) (0.374 moles, 499.2 g.) is heated to 98 C. and then 4,4-methylenebis(cyclohexylisocyanate) (0.187 mole, 49.0 g.) is added.

EXAMPLE 32 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2-isopropyloxazolidine (Mw 1860) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is added lPOX (0.578 mole, 1 12.8 g.) and Bu SnO (0.2% on polyester, 2.75 G). The flask is heated to 125 C. and e-caprolactone (8.67 mole, 988.4 g.) is added over a 90 minute period. When the feed is complete the batch is held at 125 C. for 60 minutes to complete the reaction. The product is solid (calcd. mol. wt. 1860, solids 98.1%, equivalent weight as supplied for reaction with isocyanates 635 g./eq.).

EXAMPLE 33 Bisoxazolidine of 3-[Hydroxy-(polypentylenecarbonyloxy)ethyl]-2-isopropyloxazolidine (Mw 1860) and 4,4 -methylenebis( cyclohexylisocyanate) 3- Hydroxy-( polypentylenecarbonyloxy )ethyl ]-2- isopropyloxazolidine (Mw 1860) (0.28 mole, 534.0 g.) is heated to 100 C. and then 4,4-methylenebis(cyclohexylisocyanate) (0.14 mole, 36.7 g.) is added. The mixture exotherms to 112 C. and is allowed to cool with stirring to 100 C. for 30 minutes. At room temperature this isocyanate coupled, bisoxazolidine product is a waxy solid (calcd. mol. wt. 4000, solids 98.2% eq. wt. 1018 g./eq.). The product is mixed with xylene and various diand polyisocyanates to produce moisture curing coatings.

EXAMPLE 34 3-[ Hydroxy-(polybutylenecarbonyloxy )ethyl1-2-isopropyloxazolidine (Mw 3945) To a flask equipped for stirring, addition, heating, reflux and automatic temperature control is added lPOX (0.20 mole, 39.6 g.) and Bu SnO (0.25% on polyester, 0.92 g. The flask is heated to 125 C. and a solution of e-caprolactone (2.6 mole, 296.4 g.) and valerolactone (0.4 mole, 40.0 g.) is added over a 60 minute period. When the feed is complete, the batch is held at 125 C. for minutes to complete reaction. The flask is cooled to C. and then 4,4'-methylenebis(cyclohexylisocyanate) (0.10 mole, 26.2 g.) is added. The reaction exotherms to 1 13 C. and is allowed to cool with stirring to 100 C. for 30 minutes. At room temperature this isocyanate coupled, bisoxazolidine product is a waxy solid (calcd. mol. wt. 3945, solids 98.3% eq. wt. as supplied for reaction with isocyanates 1005 g./eq.). The product is mixed with xylene and various diand polyisocyanates to produce moisture curing coatings.

EXAMPLE 35 Hydrocurable Composition of 3-[hydroxy(polypentylenecarbonyloxy)propyl]tetrahydro-l,3-oxazine and N,N ,N '-tris-( 6-isocyanatohexamethylene )biuret Step A 3-(v-hydroxypropyl)tetrahydro-1,3-oxazine 15 To a glass reaction vessel equipped with stirrer, thermometer, and condenser fitted with a water trap is added di-(3-hydroxypropyl) amine (3.0 mole, 399 g.) and toluene (500 g.). Paraformaldehyde (3.15 mole,

16 with various diand polyisocyanates to produce moisture curing coatings.

By treating a 2-(R hydroxyethyloxazolidine l mole) with e-caprolactone (A moles) in the presence 90% pure, 105 g.) is weighed out and about 1/3 is of a catalyst a correspondingly substituted 2-(R )hyadded to the amine solution. The resulting mixture is droxy(polypentylenecarbonyloxy)ethyloxazolidine is stirred and heated to 90 C. while slowly adding the reobtained which product when reacted with one or more maining paraformaldehyde in about 70 minutes. The equivalents of an isocyanate affords the correspondreaetion is heated to reflux and the water separated. ingly substituted hydrocurable composition. Table 1, After 4 hours, a total of 63 ml. of water is removed. below, illustrates the R substituent, the number of Toluene is removed at reduced pressure. The residue is moles of e-caprolactone (A), the amount and type of distilled at high vacuum to yield 3-(v-hydroxypropyl)- catalyst, the temperature, the reaction time, and the tetrahydro-l,3-oxazine. isocyanate employed. Also, the molecular weight and Step B Hydrocurable composition of 3-[hydroxy(- equivalent weight of the hydrocurable composition,

polypentylenecarbonyloxy)propyljtetrahydro-1,3- when obtained, are reported. oxazine and N,N-N"-tris-(6-isocyanatohexame- The following is an explanation of the isocyanates thylene)biuret represented by Roman numerals and of other various To a flask equipped for stirring, addition, heating, resymbols employed in the tables. flux and automatic temperature control is charged 3- (hydroxypropyl)tetrahydro-l,3-oxazine (0.9 mole, 130.5 g. e-caprolactone 1.8 mole, 205.2 g.) and Bu L :msmyimute havmg 36 carbm 7 l 8 6 Th fl k h d d1arn1nc (DDI) Sno (075 5 on p yester, g-)- e 45 c g 15 2. ll1s4,4-methyleneb1s(cyclohexyhsoheated to 100 C. and held at that temperature while 1 q lar me) h I h r 4 I is met y ene- 15 -p eny isocyanate e-caprolactone (7.2 mole, 820.8 g.) is added over a 6 0 is toluene diisocyanme minute perlod. After the feed 1s complete the batch 1s 5. V' is 3-isocyanatcmethyl-3,5,5-trimethyl- O cyclohexylisocyanate held at I00 C. for 6 hours to complete the reaction. 6 is N'wrbifi isocyunflwhcxumcthyl The product 3-[hydroxy(polypentylenecarbonyloxy)- ene)biuret propylltetrahydro-l ,3-oxazine is a fluid while hot but $535 N yi g g i f I on cooling forms a waxy solid (calcd. mol. wt. 1285, zolidin': mpmpy y mxyct y equivalent weight for reaction with isocyanate, 426 Xing icmcs ultoxazolidine g./eq.). The product (0.5 mole) is mixed with xylene [C mcyanme and to produce a moisture curing coating.

TABLE I A Catalyst Temp. Reaction Product Ex. No. R2 moles (mole 71) C. Time (hrs) isocyanate MW EaW 3 7 H 5 Bu:SnO-4 100 6 1240 38 H 8 Bu. .Sn0-4 100 4 1590 39 H 15 Bu- SnO-4 100 12 2750 40 H 5 Bu SnO-4 100 6 41 H 8 Bu. .sn0-4 100 8 42 CH(CH1,). 5 Bu. .sno-4 100 6 43 CH(CH;,) 8 Bu SnO-4 100 8 44 CH CH 15 Bu:SnO-5 125-150 1 1 4300 1488 45 CH(CH;,)2 Bu. .Sn0-5 125-150 11 4000 1404 46 CH(CH;,)2 Bu SnO-5 125-150 111 47 CH(CH Bu SnO-5 125 150 1v 3910 1380 48 CH CH Bu. .sno-5 125-150 v 3960 1394 49 CH(CH;,)2 Bu. .sn0-5 125-150 v1 170 1465 50 -CH(CH;,). 86 560-025 125 2.5 1860 635 51 CH CH,. BU SnO-0.25 125 11' 4000 1018 52 CH(CH 10 Bu- SnO-0.25 125 2 1300 445 53 CH(CH:,): Bu. ,sn0 0.25 125 11' 2860 733 54 -CH(CH;,) 5 811 560025 125 3 730 255 55 CH CH.. Bu SnO-0.25 125 11 1720 448 56 -CH CH,, 5 Bu SnO-0.25 125 v1 2754 508 57 CH(CH;,) 13 Bu SnO-0.25 125 2.5 11' 3945 1005 58 CH(CH;,) 5 NaOMe-0.25 125 8 v1 1720 448 HYd 3 3 i T of l t t Films were made with a selection of isocyanates as roxy ?g g i oxypropy e indicated in the following Tables II and Ill and rudim y 'Oxdzme mentary properties determined. Table II summarizes Hydroxy-3-(3-polypentylenecarbonyloxypropyl)tet- 60 the results when the hydroxyoxazolidine functional rahydro-l,3-oxazine (0.42 mole, 539.7 g.) is melted compounds are employed and Table III summarizes the and heated to C. and 4,4-methylenebis(cyclohexresults when the bisoxazolidine compounds are emylisocyanate) (0.21 mole, 55.0 g.) is added. The mixployed. The oxazolidine/e-caprolactonel/isocyanate ture exotherms to 101 C. and is held at C. for 30 hydrocurable compositions afford high solids, long pot 65 minutes to complete the reaction. At room temperature this isocyanate coupled, bis(tetrahydro-l,3-oxazine) is a waxy solid (calcd. mol. wt. 2832, 708 g./eq. for reaction with isocyanate). The product is mixed life resins which cure in the presence of atmospheric moisture to afford attractive, tough, solid resistant coatings as shown by the viscosity, tack-free time and film properties of the polymers.

Improved solution stability without an increase in tack-free time is realized with the bisoxazolidine (i.e., isocyanate coupled) resins. Similar results are observed What is claimed is: l. A composition comprising a compound of the following structural formula:

with a selection of diand triisocyanates. 5 R R Pencil hardness scale extends from 68 (softest) to Ci 3 5B, 4B, 3B, 2B, B. HB, F, H, 2H, 3H, 4H, 5H, 6H, and 3 9H (hardest). The point of the pencil is rubbed down /N-X C (CR 2)nCHR Z OH on flint paper to a flat surface. The pencil is held at 45 Y to the surface to be tested and then pushed across the 10 wherein R is hydrogen, mononuclear aryl, aralkyl or surface. The rating is the hardest pencil that does not alkyl; R is hydrogen or alkyl or R and R are joined break the film. together with the carbon atom to which they are attached to form cycloalkyl; R is hydrogen, alkyl, cyclo- Garnder-Holdt Viscosity is a bubble rise comparison alkyl, alkoxy or mononuclear aryl; R, R and R may viscosity. The same to be tested is placed in a standard 15 be substituted with halo, lower alkoxy, hydroxy, amino viscosity tube. The sample is then compared to a series or nitro; Y is unsubstituted or substituted lower alkylof standard liquids with assigned letter values. The ene; Xis substituted or unsubstituted lower alkylene; n visocosity of the sample is the letter value of the stanis an integer of at least 3, and z is an integer of 1-50 and dard with the same bubble rise rate. The scale of the a polyfunctional isocyanate. standards runs from A-6 (lower viscosity) to Z-lO 2O 2 A composition according to claim 1 of the follow- (highest). ing structural formula:

TABLE II (Oxazolidine/eCaprolactone/llsocyanate Polymers) (eq. polyester/l eq. isocyanate cast from xylene at 5071 solids) Composition Viscosity Film eCaprolactonc (GH after x Hrs.) Tack Free Film Properties No. (moles )lOX l mole) IC 1 4 22 48 144 Min. Appearance Swelling Hardness IA S/HEOX 1' A2 A2 A2 A l B 60 clear light 6B 2A 8/HEOX A2 A1 A] A1 C 60 hazy light 3A IS/HEOX C D E F N 90 hazy mod. and

' lifting 4A S/IPOX A3 A3 A3 A3 A3 240 clear swollen 5A 8/IPOX A2 A2 A2 A2 A2 240 clear moderate 6A S/HEOX VI 5 W x clear slight H 7A 8/HEOX T X x 10 clear v. slight F 8A l5/HEOX x l5 clear v. slight 6B 9A 5/lPOX D D E E G 60 clear v. slight F 10A 8/lPOX M P R S W 30 clear v. slight F 1 IA X/HEOX 1 A4 A2 B D 1 24 hrs. v. poor moderate 12A 8/HEOX Vl A x 120 clear slight 6B 13A SIHEOX ll A3 A3 A3 A3 60 clear v. slight F 14A 8/HEOX A3 A3 A3 A2 I20 clear v. slight 38 15A S/lPOX A4 A4 A4 A4 120 clear slight F 16A 8/lPOX A4 A4 A4 A3 I clear slight F 17A 5/HEOX A4 A4 30 clear slight 18A SIHEOX Ill T I 15 clear slight 19A 8/HEOX lV' A3 A3 A3 A2 30 clear slight 20A 8/HEOX lll G x 15 clear slight 21A IS/HEOX IV A A B B I 60 hazy slight 22A l5/HEOX lll V X x l5 clear slight 23A SllPOX IV A4 A4 A4 A4 A2 30 clear slight 24A 5/IPOX lll B D x l5 clear slight 25A 8/lPOX lV A4 A4 A4 A4 A3 clear slight 26A 8/lPOX III B K x 15 clear slight Solution sealed in viscosity luhes under N After 30 minutes exposure to 2-hydroxyethyl acetate at room temperature TABLE III (Oxaxolidine/e-Caprolactone/lsocyanatel/lsocyanate Polymers) 1 eq. coupled polyester/l eq. isocyanate cast from xylene at 5071 solids) Polyester Viscosity Film Properties Film e-Caprolactone (GH after it hrs) Tack Free No. (mole OX [C isocyanate l 4 -2 48 144 (Min.0 Appearance Swelling A 5 HEOX l 1 Al A A D clear moderate B 5 H EOX VI l S W x 15 clear moderate C 15 IPOX l I] A A A A A hazy slight D IPOX ll B B B B B 60 hazy slight E IPOX IV A A A A A 60 hazy slight F IPOX V B B B B B 60 hazy slight G IPOX Vl l l l l I 60 hazy slight 'Solutions sealed in viscosity tuhes under N "After 30 minute exposure to Z-hydroxyethyl acetate at room temperature wherein R is hydrogen or lower alkyl and z is an int eger of -20.

3. A composition according to claim 2 wherein the isocyanate is selected from N,N',N"-tris(6- isocyanatohexamethylene)biuret, 4,4-methylene-bis(- cyclohexylisocyanate), an aliphatic diisocyanate derived from a 36 carbon diamine, methylene-bis(4- phenylisocyanate), toluene diisocyanate, 3- isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, 2-isocyanatoethyl 6-isocyanatocaproate or 2- isocyanatoethyl 2-isocyanatopropionatc.

4. A composition according to claim 3 which comprises 3-[hydroxy(polypentylenecarbonyloxy)ethyl- ]oxazolidine and an isocyanate selected from N,N'N"- tris( 6-isocyanatohexamethylene)biuret, 4,4-methylene-bis(cyclohexylisocyanate) or an aliphatic diisocyanate derived from a 36 carbon diamine.

5. A composition according to claim 3 which comprises 3-[ hydroxy-( polypentylenecarbonyloxy )ethyl 2-isopropyloxazolidine and an isocyanate selected from N,NN"-tris(6-isocyanatohexamethylene)biuret, 4,4- methylene-bis-(cyclohexylisocyanate) or the diisocyanatc derived from a 36 carbon diamine.

6. A composition according to claim 1 wherein the isocyanate is selected from N,N'N"-tris(6- isocyanatohexamethylene)biuret; 4,4'-methylene-bis(- cyclohexylisocyanate), an aliphatic diisocyanate derived from a 36 carbon diamine, methylene-bis(4- phenylisocyanate toluene diisocyanate, 3- isocyanatomethyl-3,5,S-trimethylcyclohexylisocyanate, 2-isocyanatoethyl 6-isocyanatocaproate or 2- isocyanatoethyl 2-isocyanatopropionate.

7. The composition according to claim 1 wherein the ratio of molar equivalents of isocyanate functionality to the hydroxyoxazolidine is in the range of from about three to about one.

8. The process for preparing a hydrocurable composition which comprises treating the compound of the formula:

wherein R is hydrogen, mononuclear aryl, aralkyl or alkyl; R is hydrogen or alkyl or R and R are joined together with the carbon atom to which they are attached to form cycloalkyl; R" is hydrogen, alkyl, cycloalkyl, alkoxy or mononuclear aryl; R, R and R may be substituted with halo, lower alkoxy, hydroxy, amino or nitro; Y is unsubstituted or substituted lower alkylene; X is substituted or unsubstituted lower alkylene; n is an integer of at least 4, and z is an integer of l-50, with an isocyanate of the formula, Z( NCO) wherein Z is a polyvalent organic isocyanate residue and m is an integer equal to the valence of Z.

9. The process of claim 8 for preparing a hydrocurable composition which comprises treating a compound of the formula:

wherein R" is hydrogen or lower alkyl and z is an integer of 5-20, with an isocyanate of the formula, Z(NCO),,, wherein Z is a polyvalent organic isocyanate residue and m is an integer equal to the valence of Z.

10. The process of claim 9 for preparing a hydrocurable composition which comprises treating 3-[hydroxy(- polypentylenecarbonyloxy)ethylloxazolidine with an isocyanate selected from N,N ,N -tris( 6- isocyanatohexamethylene)biuret, 4,4-methylene-bis- (cyclohexylisocyanate), toluene diisocyanate, 2- isocyanatoethyl 6-isocyanatocaproate, 2-isocyanato-- ethyl 2-isocyanatopropionate; a diisocyanate derived from a 36 carbon diamine, methylenebis(4- phenylisocyanate) or isophorone diisocyanate.

11. The process for forming a polymeric material which comprises hydrocuring the composition of claim 1.

12. A film of the polymeric material of claim ll.

13. The process for forming a polymeric material which comprises hydrocuring the composition of claim 2.

14. The process for forming a polymeric material which comprises hydrocuring the composition of claim 6. 

1. A COMPOSITION COMPRISING A COMPOUND OF THE FOLLOWING STRUCTURAL FORMULA:
 2. A composition according to claim 1 of the following structural formula:
 3. A composition according to claim 2 wherein the isocyanate is selected from N,N'',N''''-tris(6-isocyanatohexamethylene)biuret, 4, 4''-methylene-bis(cyclohexylisocyanate), an aliphatic diisocyanate derived from a 36 carbon diamine, methylene-bis(4-phenylisocyanate), toluene diisocyanate, 3-isocyanatomethyl-3,5, 5-trimethylcyclohexylisocyanate, 2-isocyanatoethyl 6-isocyanatocaproate or 2-isocyanatoethyl 2-isocyanatopropionate.
 4. A composition according to claim 3 which comprises 3-(hydroxy(polypentylenecarbonyloxy)ethyl)oxazolidine and an isocyanate selected from N,N''N''''-tris(6-isocyanatohexamethylene)biuret, 4,4''-methylene-bis(cyclohexylisocyanate) or an aliphatic diisocyanate derived from a 36 carbon diamine.
 5. A composition according to claim 3 which comprises 3-( hydroxy-(polypentylenecarbonyloxy)ethyl)-2-isopropyloxazolidine and an isocyanate selected from N,N''N''''-tris(6-isocyanatohexamethylene)biuret, 4,4''-methylene-bis-(cyclohexylisocyanate) or the diisocyanate derived from a 36 carbon diamine.
 6. A composition according to claim 1 wherein the isocyanate is selected from N,N''N''''-tris(6-isocyanatohexamethylene)biuret; 4, 4''-methylene-bis(cyclohexylisocyanate), an aliphatic diisocyanate derived from a 36 carbon diamine, methylene-bis(4-phenylisocyanate), toluene diisocyanate, 3-isocyanatomethyl-3,5, 5-trimethylcyclohexylisocyanate, 2-isocyanatoethyl 6-isocyanatocaproate or 2-isocyanatoethyl 2-isocyanatopropionate.
 7. The composition according to claim 1 wherein the ratio of molar equivalents of isocyanate functionality to the hydroxyoxazolidine is in the range of from about three to about one.
 8. The process for preparing a hydrocurable composition which comprises treating the compound of the formula:
 9. The process of claim 8 for preparing a hydrocurable composition which comprises treating a compound of the formula:
 10. The process of claim 9 for preparing a hydrocurable composition which comprises treating 3-(hydroxy(polypentylenecarbonyloxy)ethyl)oxazolidine with an isocyanate selected from N,N'',N'''' -tris(6-isocyanatOhexamethylene)biuret, 4,4''-methylene-bis-(cyclohexylisocyanate), toluene diisocyanate, 2-isocyanatoethyl 6-isocyanatocaproate, 2-isocyanatoethyl 2-isocyanatopropionate; a diisocyanate derived from a 36 carbon diamine, methylenebis(4-phenylisocyanate) or isophorone diisocyanate.
 11. The process for forming a polymeric material which comprises hydrocuring the composition of claim
 1. 12. A film of the polymeric material of claim
 11. 13. The process for forming a polymeric material which comprises hydrocuring the composition of claim
 2. 14. The process for forming a polymeric material which comprises hydrocuring the composition of claim
 6. 